You could reduce the amount of relays you’re using to just a few while you’re traveling. And who knows maybe you’ll realize you only need a few which is highly likely. Combine that with what nostr:npub1lrnvvs6z78s9yjqxxr38uyqkmn34lsaxznnqgd877j4z2qej3j5s09qnw5 said about disabling media previews.